amdvlk,nixos/amdvlk: drop

different GPUs. In NixOS, there are two ways to make ICD files visible

to Vulkan applications: an environment variable and a module option.

The first option is through the `VK_ICD_FILENAMES` environment variable.

This variable can contain multiple JSON files, separated by `:`. For

example:

```ShellSession

$ export \

  VK_ICD_FILENAMES=`nix-build '<nixpkgs>' --no-out-link -A amdvlk`/share/vulkan/icd.d/amd_icd64.json

```

The second mechanism is to add the Vulkan driver package to

The way to do this is to add the Vulkan driver package to

[](#opt-hardware.graphics.extraPackages).

This links the ICD file under `/run/opengl-driver`, where it will be

visible to the ICD loader.

Modern AMD [Graphics Core

Next](https://en.wikipedia.org/wiki/Graphics_Core_Next) (GCN) GPUs are

supported through either radv, which is part of mesa, or the amdvlk

package. Adding the amdvlk package to

[](#opt-hardware.graphics.extraPackages)

makes amdvlk the default driver and hides radv and lavapipe from the device list.

A specific driver can be forced as follows:

```nix

{

  hardware.graphics.extraPackages = [ pkgs.amdvlk ];

  # To enable Vulkan support for 32-bit applications, also add:

  hardware.graphics.extraPackages32 = [ pkgs.driversi686Linux.amdvlk ];

  # Force radv

  environment.variables.AMD_VULKAN_ICD = "RADV";

  # Or

  environment.variables.VK_ICD_FILENAMES = "/run/opengl-driver/share/vulkan/icd.d/radeon_icd.x86_64.json";

}

```

supported through the RADV driver, which is part of mesa.

## VA-API {#sec-gpu-accel-va-api}

- Convenience options for `amdgpu`, the open source driver for Radeon cards, are now available under [`hardware.amdgpu`](#opt-hardware.amdgpu.initrd.enable).

- [AMDVLK](https://github.com/GPUOpen-Drivers/AMDVLK), AMD's open source Vulkan driver, is now available to be configured under the [`hardware.amdgpu.amdvlk`](#opt-hardware.amdgpu.amdvlk.enable) option.

- [AMDVLK](https://github.com/GPUOpen-Drivers/AMDVLK), AMD's open source Vulkan driver, is now available to be configured under the {option}`hardware.amdgpu.amdvlk` option.

  This also allows configuring runtime settings for AMDVLK, including enabling experimental features.

- The `moonlight-qt` package (for [Moonlight game streaming](https://moonlight-stream.org/)) now has HDR support on Linux systems.

- The `no-broken-symlink` build hook now also fails builds whose output derivation contains links to $TMPDIR (typically /build, which contains the build directory).

- `hardware.amdgpu.amdvlk` and the `amdvlk` package have been removed, as they have been deprecated by AMD. These have been replaced with the RADV driver from Mesa, which is enabled by default.

- The `services.polipo` module has been removed as `polipo` is unmaintained and archived upstream.

- `virtualisation.lxd` has been removed due to lack of Nixpkgs maintenance. Users can migrate to `virtualisation.incus`, a fork of LXD, as a replacement. See [Incus migration documentation](https://linuxcontainers.org/incus/docs/main/howto/server_migrate_lxd/) for migration information.

  ./services/hardware/acpid.nix

  ./services/hardware/actkbd.nix

  ./services/hardware/amdgpu.nix

  ./services/hardware/amdvlk.nix

  ./services/hardware/argonone.nix

  ./services/hardware/asusd.nix

  ./services/hardware/auto-cpufreq.nix

      "fontconfig"

      "penultimate"

    ] "The corresponding package has removed from nixpkgs.")

    (mkRemovedOptionModule [

      "hardware"

      "amdgpu"

      "amdvlk"

    ] "'amdvlk' has been removed. The replacement driver RADV, part of Mesa, is enabled by default.")

    (mkRemovedOptionModule [ "hardware" "brightnessctl" ] ''

      The brightnessctl module was removed because newer versions of

      brightnessctl don't require the udev rules anymore (they can use the